1/*
2 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/debugfs.h>
20#include <linux/uaccess.h>
21#include "wcn36xx.h"
22#include "debug.h"
23#include "pmc.h"
24#include "firmware.h"
25
26#ifdef CONFIG_WCN36XX_DEBUGFS
27
28static ssize_t read_file_bool_bmps(struct file *file, char __user *user_buf,
29				   size_t count, loff_t *ppos)
30{
31	struct wcn36xx *wcn = file->private_data;
32	struct wcn36xx_vif *vif_priv = NULL;
33	struct ieee80211_vif *vif = NULL;
34	char buf[3];
35
36	list_for_each_entry(vif_priv, &wcn->vif_list, list) {
37			vif = wcn36xx_priv_to_vif(vif_priv);
38			if (NL80211_IFTYPE_STATION == vif->type) {
39				if (vif_priv->pw_state == WCN36XX_BMPS)
40					buf[0] = '1';
41				else
42					buf[0] = '0';
43				break;
44			}
45	}
46	buf[1] = '\n';
47	buf[2] = 0x00;
48
49	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
50}
51
52static ssize_t write_file_bool_bmps(struct file *file,
53				    const char __user *user_buf,
54				    size_t count, loff_t *ppos)
55{
56	struct wcn36xx *wcn = file->private_data;
57	struct wcn36xx_vif *vif_priv = NULL;
58	struct ieee80211_vif *vif = NULL;
59
60	char buf[32];
61	int buf_size;
62
63	buf_size = min(count, (sizeof(buf)-1));
64	if (copy_from_user(buf, user_buf, buf_size))
65		return -EFAULT;
66
67	switch (buf[0]) {
68	case 'y':
69	case 'Y':
70	case '1':
71		list_for_each_entry(vif_priv, &wcn->vif_list, list) {
72			vif = wcn36xx_priv_to_vif(vif_priv);
73			if (NL80211_IFTYPE_STATION == vif->type) {
74				wcn36xx_enable_keep_alive_null_packet(wcn, vif);
75				wcn36xx_pmc_enter_bmps_state(wcn, vif);
76			}
77		}
78		break;
79	case 'n':
80	case 'N':
81	case '0':
82		list_for_each_entry(vif_priv, &wcn->vif_list, list) {
83			vif = wcn36xx_priv_to_vif(vif_priv);
84			if (NL80211_IFTYPE_STATION == vif->type)
85				wcn36xx_pmc_exit_bmps_state(wcn, vif);
86		}
87		break;
88	}
89
90	return count;
91}
92
93static const struct file_operations fops_wcn36xx_bmps = {
94	.open = simple_open,
95	.read  =       read_file_bool_bmps,
96	.write =       write_file_bool_bmps,
97};
98
99static ssize_t write_file_dump(struct file *file,
100				    const char __user *user_buf,
101				    size_t count, loff_t *ppos)
102{
103	struct wcn36xx *wcn = file->private_data;
104	char buf[255], *tmp;
105	int buf_size;
106	u32 arg[WCN36xx_MAX_DUMP_ARGS];
107	int i;
108
109	memset(buf, 0, sizeof(buf));
110	memset(arg, 0, sizeof(arg));
111
112	buf_size = min(count, (sizeof(buf) - 1));
113	if (copy_from_user(buf, user_buf, buf_size))
114		return -EFAULT;
115
116	tmp = buf;
117
118	for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) {
119		char *begin;
120		begin = strsep(&tmp, " ");
121		if (begin == NULL)
122			break;
123
124		if (kstrtos32(begin, 0, &arg[i]) != 0)
125			break;
126	}
127
128	wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2],
129		     arg[3], arg[4]);
130	wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]);
131
132	return count;
133}
134
135static const struct file_operations fops_wcn36xx_dump = {
136	.open = simple_open,
137	.write =       write_file_dump,
138};
139
140static ssize_t read_file_firmware_feature_caps(struct file *file,
141					       char __user *user_buf,
142					       size_t count, loff_t *ppos)
143{
144	struct wcn36xx *wcn = file->private_data;
145	size_t len = 0, buf_len = 2048;
146	char *buf;
147	int i;
148	int ret;
149
150	buf = kzalloc(buf_len, GFP_KERNEL);
151	if (!buf)
152		return -ENOMEM;
153
154	mutex_lock(&wcn->hal_mutex);
155	for (i = 0; i < MAX_FEATURE_SUPPORTED; i++) {
156		if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, i)) {
157			len += scnprintf(buf + len, buf_len - len, "%s\n",
158					 wcn36xx_firmware_get_cap_name(i));
159		}
160		if (len >= buf_len)
161			break;
162	}
163	mutex_unlock(&wcn->hal_mutex);
164
165	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
166	kfree(buf);
167
168	return ret;
169}
170
171static const struct file_operations fops_wcn36xx_firmware_feat_caps = {
172	.open = simple_open,
173	.read = read_file_firmware_feature_caps,
174};
175
176#define ADD_FILE(name, mode, fop, priv_data)		\
177	do {							\
178		struct dentry *d;				\
179		d = debugfs_create_file(__stringify(name),	\
180					mode, dfs->rootdir,	\
181					priv_data, fop);	\
182		dfs->file_##name.dentry = d;			\
183		if (IS_ERR(d)) {				\
184			wcn36xx_warn("Create the debugfs entry failed");\
185			dfs->file_##name.dentry = NULL;		\
186		}						\
187	} while (0)
188
189
190void wcn36xx_debugfs_init(struct wcn36xx *wcn)
191{
192	struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
193
194	dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
195					  wcn->hw->wiphy->debugfsdir);
196	if (IS_ERR(dfs->rootdir)) {
197		wcn36xx_warn("Create the debugfs failed\n");
198		dfs->rootdir = NULL;
199	}
200
201	ADD_FILE(bmps_switcher, 0600, &fops_wcn36xx_bmps, wcn);
202	ADD_FILE(dump, 0200, &fops_wcn36xx_dump, wcn);
203	ADD_FILE(firmware_feat_caps, 0200,
204		 &fops_wcn36xx_firmware_feat_caps, wcn);
205}
206
207void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
208{
209	struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
210	debugfs_remove_recursive(dfs->rootdir);
211}
212
213#endif /* CONFIG_WCN36XX_DEBUGFS */
214